# python：整数int、浮点数float
print(type(-1))
print(type(-1.0))
print(type(1+1.0))
print(type(1*1.0))
print(type(1/2))    #除法
print(type(1//2))   #整除
# <class 'int'>
# <class 'float'>
# <class 'float'>
# <class 'float'>
# <class 'float'>
# <class 'int'>